Casselberry Asbestos Cement Pipe Bursting Project

Transcription

1 Casselberry Asbestos Cement Pipe Bursting Project Edward Alan Ambler, P.E., LEED AP TRENCHLESS TECHNOLOGY ROADSHOW May 28-29, 2014 Scotiabank Convention Centre, Niagara Falls, ON

2 Agenda Introduction Asbestos fibers during rehabilitation Compliance with NESHAP Environmental Impact of AC Pipe Rehab Technologies Study Mitigation of future exposure risk Resistance to AC pipe bursting Casselberry pipe bursting project

3 INTRODUCTION UF Gator Graduate with BS in Civil Engineering Current UF Master s student in Environmental Engineering Diversified Civil Engineering background Major roadway design projects Dubai Maritime City infrastructure design review World Islands pre-post topographic analysis Ketchikan, Alaska City representative for construction inspection of $70 million berths for cruise ships Currently, Water Resources Manager for City of Casselberry, Florida Active musician and passionate home chef

4 INTRODUCTION City incorporated in 1940 Urban Orlando area 27,000 residents 55,000 water customers 7.8 square mile area 3 water treatment plants 1 wastewater plant 71 pump stations 215 miles of water main 150 miles of gravity sewer

5 AGENDA Introduction Asbestos fibers during rehabilitation Compliance with NESHAP Environmental Impact of AC Pipe Rehab Technologies Study Mitigation of future exposure risk Resistance to AC pipe bursting Casselberry pipe bursting project

6 HISTORY OF ASBESTOS Naturally occurring mineral fiber Attractive attributes Fire and chemical resistance Flexible, long, thin fibrous shape High strength Use of asbestos supported nationwide during the early 20 th century Navy was #1 consumer of asbestos during the first half of the 20 th century Knowledge of the dangers of inhalation solidified by 1950 s

7 ASBESTOS MINING AND MANUFACTURING OPERATIONS Large asbestos deposits are rare but found in North America and Europe in the late 19 th century Use of asbestos encouraged by developing nations and increasing wealth First commercial use as insulation in 1860 Incorporation of asbestos fibers in cement was developed in 1931 Used in pipes, wallboard and siding

8 ASBESTOS MINING AND MANUFACTURING OPERATIONS Workers for large companies like Johns-Manville and Owens Corning encountered greatest occupational risk Asbestos miners Asbestos weavers Maritime industry workers building Navy fleet

9 MANUFACTURED PRODUCTS CONTAINING ASBESTOS Fibrous insulation - #1 health hazard Sprayed in, blown in and electrical Roofing Shingles, floor and ceiling tiles Brake pads Paints, plasters, mastics, adhesives & tape Gaskets Fire blankets and curtains Boiler insulation US Navy Road surfacing Asbestos cement pipe

10 ASBESTOS CEMENT PIPE Well suited for utility systems Water, sewer, and storm water systems Gravity and pressure applications Installed predominantly in the 40 s through 60 s in the U.S. Manufacturing and installation of AC pipe curtailed in the U.S. after 1972 promulgation of NESHAP Asbestos content in pipe reduced from 20% to less than 0.2% PVC and ductile iron pipes became more popular

11 ASBESTOS FIBERS DURING REHABILITATION Casselberry and Killebrew, Inc. performed an extensive Negative Exposure Assessment on the pipe bursting project Results indicated levels of asbestos under the limits set by OSHA

12 IS AC PIPE FRIABLE AFTER BURSTING? EPA AND FDEP currently believe AC pipe that has undergone the mechanical process of pipe bursting to be regulated asbestos containing material (RACM) and SHOULD BE SUBJECT TO NESHAP. RACM is defined as friable asbestos material or non-friable ACM that will be or has been subjected to sanding, grinding, cutting, or abrading or has crumbled, or been pulverized or reduced to powder in the course of demolition or renovation operations RACM is regulated AC pipe that can be further reduced to powder by hand

13 AGENDA Introduction Asbestos fibers during rehabilitation Compliance with NESHAP Environmental Impact of AC Pipe Rehab Technologies Study Mitigation of future exposure risk Resistance to AC pipe bursting Casselberry pipe bursting project

14 NESHAP COMPLIANCE Does it apply? If so, why and how 260 LF exemption (can be less in some states) Asbestos content > 1% (AC pipe can be up to 12%) Will it be crumbled, pulverized, or reduced to powder EPA currently believe NESHAP applies to pipe bursting AC pipe, industry does not States vary with regulation practices

15 NESHAP COMPLIANCE ONLY 5 STEPS 1. Notice Submit 10 days prior to work (61.145(b)) 2. Emission Control during work (61.145(c) / ) 3. Control Public Access 2 of cover or fencing ( / ) 4. Deed Notation for site after work is complete (61.151(e)) 5. Notice Prior to Digging Up Site 45 days before digging up the site (61.154(j) / 61.1(d))

16 AGENDA Introduction Asbestos fibers during rehabilitation Compliance with NESHAP Environmental Impact of AC Pipe Rehab Technologies Study Mitigation of future exposure risk Resistance to AC pipe bursting Casselberry pipe bursting project

17 ENVIRONMENTAL IMPACT OF AC PIPE REHAB TECHNOLOGIES EPA commissioned study on the environmental impacts of various AC pipe rehabilitation technologies through the Water Research Foundation Water RF Project #4465 selected the Battelle Institute and Dr. John Matthews and Ryan Stowe to perform AC pipe rehabilitation technology studies Collection of available data Field verification of available technologies UK has already conducted this research

18 ENVIRONMENTAL IMPACT OF AC PIPE REHAB TECHNOLOGIES Casselberry s project was the field test for Water RF Project #4465 Preliminary findings confirm absence of asbestos fibers as NEA previously conducted by Killebrew and Casselberry concluded Final report expected to be released in 2014

19 AGENDA Introduction Asbestos fibers during rehabilitation Compliance with NESHAP Environmental Impact of AC Pipe Rehab Technologies Study Mitigation of future exposure risk Resistance to AC pipe bursting Casselberry pipe bursting project

20 MITIGATION OF EXPOSURE RISK UTILITY CROSSINGS Occur when other utility companies are required to perform work around remaining AC pipe fragments Utility companies will not perform extensive excavation within a few inches of the new HDPE pipe The reality is - all work performed will be below the 260 linear feet threshold set forth by NESHAP

21 MITIGATION OF EXPOSURE RISK RESIDENT EXCAVATION Resident installing new tree or other will not excavate to water main depth for extended length Casselberry utilizes special locate flags that will generate questions The reality is - all work performed will be below the 260 linear feet threshold set forth by NESHAP

22 MITIGATION OF EXPOSURE RISK REPLACEMENT OF HDPE PIPE Utility provider performing AC pipe bursting must acknowledge the risk of future work required around AC pipe fragments Emergency repairs will be below the 260 linear feet threshold set forth by NESHAP Focused HDPE pipe replacement will occur after HDPE pipe has expelled its service life The reality is - all work performed will be below the 260 linear feet threshold set forth by NESHAP

23 AGENDA Introduction Asbestos fibers during rehabilitation Compliance with NESHAP Environmental Impact of AC Pipe Rehab Technologies Study Mitigation of future exposure risk Resistance to AC pipe bursting Casselberry pipe bursting project

24 RESISTANCE TO AC PIPE BURSTING UNCLEAR APPLICATION OF NESHAP Active Hazardous Waste Site One year of air monitoring Signs above site every several hundred feet In-active Hazardous Waste Site Record notation to deed to property Problem: Public right-of-way has no deed After significant discussion and demonstration of pipe bursting, EPA suggested use of the Administrator Approved Alternate

25 RESISTANCE TO AC PIPE BURSTING ACTIVE HAZARDOUS WASTE SITES

26 RESISTANCE TO AC PIPE BURSTING PIPE BURSTING SITES Don t take NO for an answer

27 AGENDA Introduction Asbestos fibers during rehabilitation Compliance with NESHAP Environmental Impact of AC Pipe Rehab Technologies Study Mitigation of future exposure risk Resistance to AC pipe bursting Casselberry pipe bursting project

28 CASSELBERRY REPLACEMENT PATH Casselberry potable water distribution network is 215 miles Prior capital improvement plan included $300,000 per year for pipe replacement which equals less than 1 mile of pipe replacement per year Pipe bursting technology was used; however not enough capital investment to be sustainable Entire network replaced in 215 years!

29 CASSELBERRY PROJECT SUMMARY Pipe bursting of 35 miles (184,800 lf) of asbestos cement (AC) pipe Project specifically targeted AC pipe replacement (pipe was selected because of age and failure rate) $10 M from the federal government ($6.5 M in grants) Question applicability of NESHAP to pipe bursting of AC pipe

30 CASSELBERRY PROJECT SUMMARY Casselberry Project received over $10 million in grant/loan funding, $6.5 million in grants American Recovery and Reinvestment Act Shovel Ready requirement No permit required by FDEP for pipe bursting up to 2 pipe size larger Project can be designed from GIS records, minimized design performed in-house Administered through the State Revolving Loan Fund Program with the Florida Department of Environmental Protection

31 CASSELBERRY PROJECT FLORIDA LEADS THE WAY April 27, 2011 FDEP Secretary writes Atlanta EPA Regional Administrator supporting the use of pipe bursting Environmentally superior to removing the old pipe More cost effective than conventional open-cut Reduces landfill space consumption with old pipe Pipe bursting has less impact on communities

32 CASSELBERRY PROJECT IMPLEMENTATION Utilized HDPE pipe because of its flexibility and strength Standard mechanical joints and stiffeners for all connections Previous pilot test used FPVC but it failed through rapid crack propagation

33 CASSELBERRY PROJECT IMPLEMENTATION Bypass pumping eliminated through accepted outages lf per day of bursting production 2-3 month project duration for urban neighborhoods minimizes resident impact

34 CASSELBERRY PROJECT NON-INVASIVE TO RESIDENTS Replace one to two City blocks in a single work day Residents are out of water for only a work day or less Minimal Excavations compared to open-cut or directional boring Reduces restoration costs and time Reduces time construction crews are present in front of residents

35 CASSELBERRY PROJECT NON-INVASIVE TO RESIDENTS Maintains same pipe alignment Pipe testing (swabbing, pressure testing, chlorination and sampling) is performed prior to its installation Residents do not see crews along their front yards for testing of the pipe line

36 CASSELBERRY PROJECT NON-INVASIVE TO RESIDENTS Pipeline is activated immediately upon installation via bursting No wait time for Record drawing preparation Pipe testing Regulatory clearance An additional reduction of construction presence to residents

37 CASSELBERRY PROJECT

38 CASSELBERRY PROJECT CONCLUSIONS Pipe bursting is a safe method of trenchless AC pipe replacement Current and future exposure risk is mitigated AC pipe bursting can occur now and meet all requirements of NESHAP > 630,000 miles of AC pipe is reaching the end of its useful life There are many economical, social and environmental benefits of pipe bursting

39 QUESTIONS Introduction Asbestos fibers during rehabilitation Compliance with NESHAP Mitigation of future exposure risk Resistance to AC pipe bursting Casselberry pipe bursting project